Enaction is a recent approach in psychology and in cognitive sciences and it remains not easy to understand and to situate. Its introduction in the field of Computer Technology and Multimodal Interfaces has been initiated explicitly in the FP6 Enactive Interfaces Network of Excellence. It is nothing less than a conceptual revolution, an important paradigm shift. Enaction and Enactive Interfaces: an handbook of Terms aims at overcoming the interdisciplinary gap inherent to this new paradigm. It has been designed as a tool to constitute a common vision on Enaction, Enactive Interaction, Enaction Knowledge and Enactive systems, allowing students and researchers to reach, at a glance, a sufficient interdisciplinary level, in order to tackle efficiently the new question of " Enaction and Technology ". Differently from dictionaries, terms are related to research in progress, addressing debates or schools differentiations, addressing other unfamiliar frameworks for laypersons of other disciplines. The handbook comprises about 200 terms covering the different fields necessary to explore the landscape of enaction and technologies: sensory-motor theories of interaction, multimodal integration, haptic and multimodal interfaces, instrumental interaction, virtual reality, design, human-computer interfaces, paradigms in cognitive sciences, robotics and teleoperation. Most of them have been written in collaboration by authors from different disciplines. Some had already a long history. The text does not only provide a definition, but revisits the term in depth, under the light of Enaction and Enactive Interfaces. Other terms are fully novel, in which case the text allows introducing the new concepts at hand. Some of them led to multiple definitions, whether because they represent stabilized different definitions in different disciplines whether because they underlie non-reducible schools and approaches.